Rana R S, Halvorson H O
J Bacteriol. 1972 Feb;109(2):606-15. doi: 10.1128/jb.109.2.606-615.1972.
Deoxyribonucleic acid (DNA) synthesis during early outgrowth of spores of Bacillus cereus T (thy(-)) has been examined. (14)C-thymidine incorporated begins 2 to 5 min after germination and continues at a slow rate up to 30 min, after which the rate of (14)C-thymidine incorporation increases considerably. Early DNA synthesis up to 30 min after germination is dependent upon simultaneous protein synthesis. The examination of the stability of proteins synthesized soon after germination shows that they are susceptible to intracellular degradation. The evidence provided here indicates that protein degradation is the cause of observed dependence of DNA synthesis on simultaneous protein synthesis. The DNA synthesis occurring soon after germination is primarily a repair type synthesis which is followed by the onset of normal replication approximately 30 min after germination.
已对蜡样芽孢杆菌T(thy(-))孢子早期生长过程中的脱氧核糖核酸(DNA)合成进行了研究。掺入的(14)C-胸腺嘧啶核苷在萌发后2至5分钟开始,并以缓慢速率持续至30分钟,此后(14)C-胸腺嘧啶核苷掺入速率显著增加。萌发后30分钟内的早期DNA合成依赖于同时进行的蛋白质合成。对萌发后不久合成的蛋白质稳定性的检测表明,它们易受细胞内降解的影响。此处提供的证据表明,蛋白质降解是观察到的DNA合成对同时进行的蛋白质合成有依赖性的原因。萌发后不久发生的DNA合成主要是修复型合成,随后在萌发后约30分钟开始正常复制。